Friction-clutch



(No ModeL) J. W. BLODGETT. FRICTION CLUTCH.

Patented May 27, 1884.-

INVENTOR 7 M .ittorney ing A by'means of a pin, G, passing trans- UNIT DSTATES PATENT OFFIcE.

JOHN WESLEY BLODGETT, or CHICAGO, ILLINOIS.

FRICTION -CL-UTCIH.

SPECIFICATION forming part of Letters Patent No. 299,453, dated May 27,1884-.

Application filed March 6, 1884. (No model.)

To all whom it may concern:

Be it known that I, J. W. BLODGETT, of

- Chicago, in the county of Oookand State of Illinois, have inventedcertain new and'useful Improvements in Friction-Clutches; and I dohereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form part of thisspecification.

This invention relates to friction-clutches; and it consists in certainimprovements in the construction of the same, having for their object toproduce a device which shall possess superior advantages in point ofsimplicity, durability, and general efficiency.

To this end it consists in the improved construction and arrangement ofparts which will be hereinafter fully described, and particularlypointed out in the claims.

In the drawings, Figure l is a plan view of my improved friction-clutch. Fig. 2 is a horizontal sectional view, and Fig. 3 is aperspective View.

The same letters refer to the same parts in all the figures.

A in the drawings designates a cylindrical casing, having a centralperforation, B, sur' rounded by an annular post, 0, upon which isjournaled a hub or sleeve, D, the periphery of which is provided withseveral notches, E.

F is a cap or cover secured upon the easversely through the post 0. Thiscap or cover has a key or feather, H, adapted to enter a notch orrecess, I, in the sleeve D, which will thus be'made to rotate with thesaid cover. The sleeve D has a radially-projecting arm, J, to the outerend of which is attached a spring, K, connecting the said arm with apawl or dog, L, having at its inner end a sharp tooth, M, fitting in anyone of the notches E in the sleeve D, and hearing at its outer endagainst the rim or periphery of the casing A.

From the foregoing description,when taken in connection with thedrawings hereto annexed, the operation and advantages of my inventionwill be readily understood. When motion is imparted to the arm N in thedirecthe motion will be imparted through sleeve D, arm J, and spring Kto the pawl or dog L,

the casing, permitting the top arm and the sleeve D to revolve withoutaffecting the position of said casing. \Vhen, on the other hand, themotion is reversed, the tooth M of pawl L will be forced into. the notchE of sleeve D, in which it is at the time adjusted, thus forcing itsouter extremities against the periphery of the casing A, and causing thelatter to revolve to an extent determined by the stroke of the arm N.The several notches E,provided in the sleeve D for the adjustment of thetooth M of dog L, enable me to regulate the tension of the spring K. 1

Having described my invention, what I claim is 1. In a friction-clutch,the combination of a cylindrical casing, having a central perforation,an annular post, a sleeve or hub on this post, provided with notches, afeather or key adapted to enter a notch, I, in the sleeve D, applied tothe cap F, a pawl, L, an arm, J, and a spring, all constructed andadapted to operate substantially in the manner and for the purposesdescribed.

2. The combination of the casing, its cap F, an annular post, a sleeveor hub having notches, the feather H, and the spring'actuated dog orpawl, substantially in the manner and for the purposes described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

Jornv WESLEY BLODGETT XVitnesses:

THEO. L. BERGEN, GHARLEs PLUMB.

tion indicated by the arrows in the figures,"

which is thus released from the periphery of

